Function GetRangeGroupLevels( _
   ByVal isRowGroup As Boolean _
) As Integer

Dim instance As IRangeGroupSupport
Dim isRowGroup As Boolean
Dim value As Integer
 
value = instance.GetRangeGroupLevels(isRowGroup)

int GetRangeGroupLevels( 
   bool isRowGroup
)

fpSpread1.ActiveSheet.AddRangeGroup(0, 20, true);
fpSpread1.ActiveSheet.AddRangeGroup(0, 10, true);
fpSpread1.ActiveSheet.RangeGroupBackGroundColor = Color.Yellow;
fpSpread1.ActiveSheet.RangeGroupButtonStyle = FarPoint.Win.Spread.RangeGroupButtonStyle.Enhanced;

FarPoint.Win.Spread.IRangeGroupSupport rangeGroupSupport = ((FarPoint.Win.Spread.IRangeGroupSupport)(fpSpread1.ActiveSheet));
if ((rangeGroupSupport == null)) {
    return;
}
int i = rangeGroupSupport.GetRangeGroupLevels(true);
if ((i > 0)) {
    MessageBox.Show(("The number of group levels is " + i.ToString()));
}

FpSpread1.ActiveSheet.AddRangeGroup(0, 20, True)
FpSpread1.ActiveSheet.AddRangeGroup(0, 10, True)
FpSpread1.ActiveSheet.RangeGroupBackGroundColor = Color.Yellow
FpSpread1.ActiveSheet.RangeGroupButtonStyle = FarPoint.Win.Spread.RangeGroupButtonStyle.Enhanced

Dim rangeGroupSupport As FarPoint.Win.Spread.IRangeGroupSupport = CType(FpSpread1.ActiveSheet, FarPoint.Win.Spread.IRangeGroupSupport)
If rangeGroupSupport Is Nothing Then
   Return
End If
Dim i As Integer = rangeGroupSupport.GetRangeGroupLevels(True)
If i > 0 Then
MessageBox.Show("The number of group levels is " & i.ToString())
End If